Sony MLS-X1 User Manual page 215

To set a shadow on channel 1 for the background for the
images on channels 1 and 3:
Set the [Ch 1 Shadow] button to the on state.
To set a shadow on channel 2 for the background for the
images on channels 1 and 2:
Set the [Ch 2 Shadow] button to the on state.
Setting a shadow using channels 2 to 4 (Ch2 +
Ch3 + Ch4)
Set a "Ch2 + Ch3 + Ch4" combine, set the [Ch 2 + Ch 3
Shadow] button to the on state, and perform the
following.
To set a shadow on channel 2 for the background for the
images on channels 2 and 4:
Set the [Ch 2 Shadow] button to the on state.
To set a shadow on channel 3 for the background for the
images on channels 2 and 3:
Set the [Ch 3 Shadow] button to the on state.
Setting a shadow using channels 1 to 4 (Ch1 +
Ch2 + Ch3 + Ch4)
Set a "Ch1 + Ch2 + Ch3 + Ch4" combine, set the [Ch 1 +
Ch 2 Shadow] button to the on state, and perform the
following.
To set a shadow on channel 1 for the background for the
images on channels 1, 3, and 4:
Set the [Ch 1 Shadow] button to the on state.
To set a shadow on channel 2 for the background for the
images on channels 1, 2, and 4:
Set the [Ch 2 Shadow] button to the on state.
To set a shadow on channel 3 for the background for the
images on channels 1, 2, and 3:
Set the [Ch 3 Shadow] button to the on state.
To set a shadow for the background for the images on
channels 1 and 2:
Set the [Ch 1 Shadow] button and [Ch 3 Shadow]
button to the on state.
Channel 3 is used as the shadow of channel 1, and
channel 4 is used as the shadow of channel 2.
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